Underfeed furnace



A. H. BLACKBURN AND'FnE. FLEMING.

UNDERFED FURNAQE.

APPLICATION HLEU MAR. 2'2\199.

yateuted Jan. 6

' their opposite edges and overlapping at j tio are moved to vary their relative angles, any clinker formations tend to be broken up, and the rocking of the twyer-hlocl -portion tends to prevent or overcome the formation of clinkers adjacentthe lip of the scope of the same, within the scope of .the

appended claims.

`li/Vhat we claim is: I

l. In an'underfeed furnace, the coinlninawith a retort, and'ash-disposal means laterallyV spaced from said retort, of 'an in tervening sideffioor structure comprising plates respectively pivoted adjacent each the vretort and the ash disposal means, and means for raising and lowering the proximate free edges of said plates. l

2. In an. underfeed furnace, the combination with the retort and ashdisposal means laterally spaced from said retort, of an intervening laterally down-sloping door structure comprising inner and 'outer courses of short plates, respectively pivot/ed adjacenttheir adjacent edgeafand means for raising Y and lowering, jointly, the meeting edges of the plates. j

3. In an underfeed furnace, the combination with the retort and ash disposalY means i laterally spaced from said retort, of an inner floor-section pivoted adjacent the retort and providing a supporting.surface` and-a skirt,s`aid skirt shaped to maintain s .bstantial approximation of Contact with he 'retort as the section is rocked, a secc nc Hooi-- section pivoted adjacent thel ashd. Josal means and extending inward toan approximeente mation' ot Contact with the tree edge of the irst said section, and means t'or raising and 1' lowering the-adjoining edges'of sald sections in unison.

4. In an underfeed furnace, the combiination of a retort, ash disposal means lat-t erally spaced from said retort, an innert floor section pivotally mounted adjacenty pivot `and said skirt extending inwardly therefrom, said skirt comprising an in- 'said retort and comprising a suppprtingf surface and a skirt, said supporting surfaces extending laterally outward beyond the clined portion with twyers therein forming' an air supplying lip for the retort and/fa curved portion to maintain 'an approximation of vcontactwiththe retort as the section is moved, 'an outer floor section' pivotally inwardly therefrom to an approximation of contact with the free edge of the first s'aid section, and means for raising and lower- ,sup orted adjacent the ash disposal means an having a supporting surface extending 'j ing the adjacentv .edges of said sections '5. ln a furnace of the character. described,

the -combination of a retort,l a partition structure having pivot lugs near its top and spaced vfrom said retort, cross-bars connecting said partition structure and the retort and having Vpivot lugs adjacent the retort, floor plate members pivotally carried by Said' spaced lugsy and havin their free edges overlapped, a rock shait, and connections from said rock shaft to the'free ends of both 1 said plate structures to .raise and -lower them jointly.

6. In a furnace of the character described, a side wall, a retort, an intervening partition, ash dump means between the wall and partition, and self-cleaning floor sections between the partition and retort, such sections pivoted near their opposite edges, operating.

means for raising and lowering the adjoing ing edges of said sections and means for-'f holding said operating means in midaposi-l tion.

VARTHUR BLACKBURN..

FRANK E. 1illVlllTG. 

